William a



(No Model.)

W. A. SPRING.

CHILL RING.

2 9 am W n J M m M l P m M Nrrnn STATES PATENT WILLIAM A. SPRING, OFCHICAGO, ILLINOIS, ASSIGNOR TO THE GATES IRON WORKS, OF SAME PLACE.

CHILL-RING.

SPECIFICATION forming part of Letters Patent No. 79,958, dated August 2,1892.

Application filed November 20, 1891. Serial No. 412,506. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM A. SPRING, a citizen of the United States,residing at Chicago, Illinois, have invented certain newand usefulImprovements in Chill-Rings, of which the following is a specification.

The object of my invention is to make a chilling-ring to chill theinterior of castings, which is capable of diminishing in diameter as thecasting contracts on it in cooling; and

my invention consists in the features and details of constructionhereinafter described and claimed.

In the drawings, Figure l is a perspective I 5 view of a portion of aring-casting in its uncont-racted condition with my improvedchilling-ring in place. Fig. 2 is a perspective view of the same afterthe casting has contracted, and Fig. 3 is a perspective view of one ofthe sections of my chilling-ring.

As is Well known, it is very difficult, if not impracticable, to castmetals around a ring of metal or other material to chill the interior ofthe casting. Owing to the contraction that takes place as the castingcools and the inability of the chilling-ring to correspondinglycontract, the casting will often be cracked and broken. It is toovercome this difficulty and to make a chilling-ring that will adaptitself to the contraction of the metal of the casting by correspondinglydiminishing in diameter that I have made my invention.

In making myimproved chilling-ring I make it of substantiallytriangularpointed sections A, with the'point of each section arranged at the buttof the adjacent section. The ring is the interior of the casting ischilled by contact with the chilling-ring. This causes the casting tocontract upon the chilling-ring and to exert an external pressure uponit. Under this external pressure the sections of the chilling-ring moveor slide endwise away from each other to a sufficient extent to accommo-0 date the diameter of the ring to the decreasing size of the casting.The ring thus increases in length and decreases in diameter underpressure from the contracting casting.

It may thus be considered as a compressible or contractible ring underexternal pressure.

I have found from experience that no breaking or cracking of the castingcan take place when chilled upon a chilling-ring comprising a number ofpointed sections with their points alternating from end to end of thering, so that the sections may slide or move away from each other todiminish the diameter of the ring.

What I regard as new, and desire to secure by Letters Patent, is

1. For chilling the interior of castings, a chilling-ring comprisinganumber of pointed sections with the point of one section at the butt ofthe adjacent section, substantially as described.

2. For chilling the interior of castings, a chilling-ring comprising anumber of pointed sections having abutting edges radial to the axis ofthe ring arranged point to butt and movable endwise from each otherunder external pressure to diminish the diameter of the ring as thecasting contracts on it, substan tially as described.

WILLIAM A. SPRING. lVitnesses:

EPHRAIM BANNING, SAMUEL E. I-IIBBEN.

